Impacted Canines

An impacted tooth simply means that it is “stuck” and cannot erupt in to function. Patients frequently develop problems with impacted third molar (wisdom) teeth. These teeth get “stuck” in the back of the jaw and can develop painful infections among a host of other problems (see Impacted Wisdom Teeth under Procedures). Since there is rarely a functional need for wisdom teeth, they are usually extracted to prevent future problems. The maxillary cuspid (upper eyetooth) is the second most common tooth to become impacted. The cuspid tooth is a critical tooth in the dental arch and plays an important role in your “bite”. The cuspid teeth are very strong biting teeth and have the longest roots of any human teeth. They are designed to be the first teeth that touch when your jaws close together so they guide the rest of the teeth into the proper bite.Normally, the maxillary cuspid teeth are the last of the “front” teeth to erupt into place. They usually come into place around age 13 and cause any space left between the upper front teeth to close tighter together. If a cuspid tooth becomes impacted, every effort is made to get it to erupt into its proper position in the dental arch. The techniques involved to aid eruption can be applied to any impacted tooth in the upper or lower jaw, but most commonly they are applied to the maxillary cuspid (upper eye) teeth. Sixty percent of these impacted eyeteeth are located on the palatal (roof of the mouth) side of the dental arch. The remaining impacted eyeteeth are found in the middle of the supporting bone but stuck in an elevated position above the roots of the adjacent teeth or out to the facial side of the dental arch.

Early Recognition of Impacted Eyeteeth is the Key to Successful Treatment

The older the patient, the more likely an impacted eyetooth will not erupt by nature’s forces alone even if the space is available for the tooth to fit in the dental arch. The American Association of Orthodontists recommends that a panorex screening x-ray, along with a dental examination, be performed on all dental patients around the age of seven years to count the teeth and determine if there are problems with eruption of the adult teeth. It is important to determine whether all the adult teeth are present or some adult teeth are missing. Are there extra teeth present or unusual growths that are blocking the eruption of the eyetooth? Is there extreme crowding or too little space available causing an eruption problem with the eyetooth? This exam is usually performed by your general dentist who will refer you to an orthodontist if a problem is identified. Treating such a problem may involve an orthodontist placing braces to open spaces to allow for proper eruption of the adult teeth. Treatment may also require referral to an oral surgeon for extraction of retained baby teeth and/or selected adult teeth that are blocking the eruption of the all-important eyeteeth. The oral surgeon will also need to remove any extra teeth (supernumerary teeth) or growths that are blocking eruption of any of the adult teeth. If the eruption path is cleared and the space is opened up by age 11-12, there is the possibility that the impacted eyetooth will erupt with nature’s help alone. If the eyetooth is allowed to develop too much (age 13-14), the impacted eyetooth will not erupt by itself even with the space cleared for its eruption. If the patient is too old (over 40), there is a much higher chance the tooth will be fused in position. In these cases the tooth may not budge despite all the efforts of the orthodontist and oral surgeon to erupt it into place. Sadly, the only option at this point is to extract the impacted tooth and consider an alternate treatment to fill the space. Replacement options should be discussed prior to the day of extraction of the canine especially if immediate bone grafting for an implant is the best option.

What Happens if the Eyetooth Will Not Erupt When Proper Space is Available?

In cases where the eyeteeth will not erupt spontaneously, the orthodontist and oral surgeon work together to get these unerupted eyeteeth to erupt. Each case must be evaluated on an individual basis but treatment will usually involve a combined effort between the orthodontist and the oral surgeon. The most common scenario will call for the orthodontist to place braces on the teeth (at least the upper arch). A space will be opened using a “coil spring”. This will provide room for the impacted tooth to be moved into its proper position in the dental arch. If the baby eyetooth has not fallen out already, it is usually left in place until the space for the adult eyetooth is ready. Once the space is ready, the orthodontist will refer the patient to the oral surgeon to have the impacted eyetooth exposed and bracketed.In a simple surgical procedure performed in the surgeon’s office, the gum tissue on top of the impacted tooth will be lifted up to expose the hidden tooth underneath. If there is a baby tooth present, it will be removed at the same time. Once the tooth is exposed, the oral surgeon will bond an orthodontic bracket to the exposed tooth. The bracket will have a miniature gold chain attached to it. The oral surgeon will cut the chain to the correct length and attach it to the orthodontic wire. Sometimes the surgeon will leave the exposed impacted tooth completely uncovered by suturing the gum up high above the tooth or making a window in the gum covering the tooth (on selected cases located on the roof of the mouth). Most of the time, the gum will be returned to its original location and sutured back with only the chain remaining visible as it exits a small hole in the gum.

Shortly after surgery (1-14 days), the patient will return to the orthodontist who will then start to apply a rubber band that will put a light eruptive pulling force on the impacted tooth. This will begin the process of moving the tooth into its proper place in the dental arch. This is a carefully controlled, slow process that may take up to a full year to complete. Remember, the goal is to erupt the impacted tooth and not to extract it! Once the tooth is moved into the arch in its final position, the gum around it will be evaluated to make sure it is sufficiently strong and healthy. In some circumstances, especially those where the tooth had to be moved a long distance, there may be some minor “gum surgery” required to add bulk to the gum tissue over the relocated so it remains healthy during normal function. Your dentist or orthodontist will explain this situation to you if it applies to you specific situation.